Rechargeable portable charging device



FIG. 1 is a front, top perspective view of a rechargeable portable charging device;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a side view thereof as seen from the left-hand side of FIG. 1, the opposite side view being a mirror image thereof.

The device being shown with ports in phantom lines in FIGS. 1, 4 and 5 that form no part of the claimed design. 

The ornamental design for a rechargeable portable charging device, as shown and described. 